72 lines
2.0 KiB
NASM
72 lines
2.0 KiB
NASM
;; @file
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; Interrupt Redirection Template
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;
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;******************************************************************************
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;* Copyright (c) 2012 - 2016, Insyde Software Corp. All Rights Reserved.
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;*
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;* You may not reproduce, distribute, publish, display, perform, modify, adapt,
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;* transmit, broadcast, present, recite, release, license or otherwise exploit
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;* any part of this publication in any form, by any means, without the prior
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;* written permission of Insyde Software Corporation.
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;*
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;******************************************************************************
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SECTION .text
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;----------------------------------------------------------------------------
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; Procedure: InterruptRedirectionTemplate: Redirects interrupts 0x68-0x6F
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;
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; Input: None
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;
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; Output: None
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;
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; Prototype: VOID
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; InterruptRedirectionTemplate (
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; VOID
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; );
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;
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; Saves: None
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;
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; Modified: None
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;
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; Description: Contains the code that is copied into low memory (below 640K).
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; This code reflects interrupts 0x68-0x6f to interrupts 0x08-0x0f.
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; This template must be copied into low memory, and the IDT entries
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; 0x68-0x6F must be point to the low memory copy of this code. Each
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; entry is 4 bytes long, so IDT entries 0x68-0x6F can be easily
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; computed.
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;
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;----------------------------------------------------------------------------
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global ASM_PFX(InterruptRedirectionTemplate)
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ASM_PFX(InterruptRedirectionTemplate):
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int 0x8
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DB 0xcf ; IRET
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nop
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int 0x9
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DB 0xcf ; IRET
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nop
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int 0xa
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DB 0xcf ; IRET
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nop
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int 0xb
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DB 0xcf ; IRET
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nop
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int 0xc
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DB 0xcf ; IRET
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nop
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int 0xd
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DB 0xcf ; IRET
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nop
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int 0xe
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DB 0xcf ; IRET
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nop
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int 0xf
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DB 0xcf ; IRET
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nop
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global ASM_PFX(DummyInterruptTemplate)
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ASM_PFX(DummyInterruptTemplate):
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DB 0xcf ; IRET
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